Typewriting machine



Aug. 18, 1931. L. c. MYERS ETAL 18,153

TYPEWRITING MACHINE Original Filed Dec. 20, 1924 2 Sheets-Sheet l Aug. 18, 1931. c. MYERS ETAL Re. 18,158

TYPEWRITING MACHINE 2 Sheets-Sheet 2 Original Filed Dec. 20, 1924 printing.

Reisaued Aug. 18, 1931 j-UNITED STATES PATENT oi-rice Laws 0. mas, or rannroa'r, AND snonon F.

war, or GLENDALE, nnw YORK,

.LEIIGIIDBS TO ROYAL TYPEWRITER COMPANY DIG, OF NEW YORK; N. Y.

CORPORATION OF NEW YORK 'rYrEwnrrmo mm Original 1T0. 1,562,119, dated November 1'7, 1925, Serial No. 757,189, filed December 20,- 1924. Application for reissue filed June 24,

This invention relates to a support for the entire-shift frame which is made adjustable in the main frame in order that the position of the platen may be determined accurately with reference to the impression of the entire face of the type bars. It is shown as applied to a small, portable machine of very com ct construction. but many features of the invention are useful in other types of machines. The particular embodiment of the invention is especially advantageous in a machine wherein the type bars operate at an angle of approximately 30 to the vertical at the time oilprinting.

Patent to ess and Myers, No. 1,417,902 of May 30, 1922, discloses a construction in which the shift irame is given a movement for adjustment. This construction, however, shows a carriage supported on a single rail for traveling movement and the adjusting movement is a pivotal one, being effected by the movement of an eccentric screw controlling one o! the parallel linksof the shift frame. Such an adjustment is not well adapted for the present type of machine in which the carriage travels upon two rails and in which the type bars and platen-bear a diflerent angular relation at the time of An object of the invention is to provide a support whereby the whole shift frame and its appurtenances is mountedin an auxiliary frame adjustably carried by the main irame of the machine. v

Another object of the inventionis to provide simple means for adjusting theauxiliary frame as a whole in a direction at right angles to the position of the type bar at the time of printing.

A further object of the invention is to pro vide means for obtaining a fine adjustment of thischaracter and holding the parts in adjusted position.

Another object of the invention is to provide means for mounting the rail which serves as an axis for the shift frame in such manner that it may have adjustment with the remainder of the shift frame without interfering with its necessary pivotal moverm. Serial No. 71,274.

ment whenever the frame is moved by the operation of the shift key. 1

A still further objectof the invention is to provide simple and eflicient means for ad- 'usting the position of one rail of the shift frame with relation to the other.

Other objects of the invention will be apparent from the following detailed description and appended claims.

In the drawings:

Figure 1 is a vertical fore and aft section with parts in elevation of a typewriting machine emhodying our invention.

Figure 2 is a similar section with parts in elevation showing the mounting of the shift frame.

Figure 3 is a similar view showing one of the side plates with its relation to the main frame and also'a slight modification.

Figure 4 is a top plan view of the carriage tracks and shift frame at one side of the machine. Y r

Figure 5 is a section taken substantially on the line 5-5of Figure 2.

Figure 6 is a fragmentary detail showing one form of the means for obtaining a fine adjustment of the shift frame.

Figure 7 is a section substantially on the line 7-7 of Figure 3 showing a modified form of adjustment.

Figure 8 is a similar section showing the sliding relation oi the plate to the main frame when no means is employed for obtaining the fine adjustment. I

Figure this a. detail view showing more clearly the arrangement of the stops for limiting the hilt movement in the form illustrated in Figure 2.

Figure 10 is a'section on of Figure 4.

The invention is disclosed as illustrated in a typwriting machine having a frame A, platen B, a segment C, type bars I), and the other usual instrumentalities. Except as hereinafter noted these may be of any usual or desired type. The segment C is provided with an abutment E against which the type bars strike when at printing position and which. limits their movement toward the platen. when in printing position they opthe line 101O crate at an an le of ap roximately 30 to the vertical as s own in Figure 2.

The platen is supported in a carriage comprising slower l hevilg track ele ments- 2 and axwhich' coopeiate" with track elements 4 and 5 on the shifting frame by means of balls 6 which are s aced by spannels 7 in the usual manner. I "Ihe rail or track element 4 is rigidly mounted While the rail or track element 5 is adjustable horizontally to provide means for properly assemblin the device and to enable any inaccuracies 0 manufacture to be easilyovercome. A su porting arm 8 is rigidly secured to the front rail 4 and adjustabl secured to this arm by screws 10 passing rough slots 10' is a tie plate 9. This tie plate carries the rear rail 5.

It is to be understood that this mechanism is duplicated at each side of the machine and the-same is true of the mounting of the shift frame hereinafter set.forth.' In order to obtainclearness of description only one sikieof the machine is usually referred to.

Rocker arms 11 are connected at their forward ends to the rail structure just described and are secured at their rear ends to a shaft 12 which at one side of the machine has a depending arm 13 which is 0 rated th 11 mechanism not herein described in detail for the purpose of shiftin the-carriage for case shift movement. counterbalance spring 14 attachedto the shifting arms and to the frame of the machine serves to assist the shifting movement. a

To the lower end of the arm 8 is ivoted a link 15 which is substantially paral el to the arm 11 and theother end-ofthis link is pivoted by a screw 16to the plate 17. This'parallel link'movementis for the p 'of giving the shift frame and laten their proper movement when shi --for uppercase characters. 7 f

Since the type bars are. limited in their movement toward the platen, it is necessary to accurately pos'tion the carria e in driier that the :type imprints shall 'be since the type bars stand at an angle of about f to the vertical whenat'printing point, this adjustment should be in a right line and substantially 'perpendicularto the type bars when at' printing int. This a 'ustment is obtained by means zibout to be d dscribed;

- The plate 17 is mounted to slide in a line perpendicular to the t pe bars when at p ng position and is eid in proper relation to the of the machine by means of openlngs 18 in the machine frame A through which pass ears 19 offset from said plate. The plate 17 is heldin its adjusted position by mechanism particularly'shown in Flgures 4 and 5. Thescrew 16 threads into a stud 20, theend of'which fits into' the plate 1-7. A screw 21 passes thmugh a short slot in I the'main frame A "and threads into the stud 20. The rock shaft 12 has a cone bearing 22 threaded into the end thereof and this cone bears in the correspondingly shaped end of ashorthollow Stud 23Whiehm1so fits into plate 17. A screw 24,,similarflto the screw 21 in its form and mounting, passes through the machine frame A into the stud 23. r v

It is evident from this descri tion that the whole shift frame, including t e rock shaft 12 andvthe arallel link construction, is suppoi-ted by t e plates 17 and that these plates with the structure supported thereby can be adjusted with reference to the main frame of the machine and are held in the desired adjusted position by tightening the screws 21 and 24. In the form shown in Figure 2 there is no particular means for moving the plates 17 to the desired position. After the screws 21' and 24 are loosened, these plates may be moved manually in any'manner as by inserting the end'of a screw driver in one of the slots 18 and giving the plates the desired movements When located in the desired position,

the screws 21 and 24 are again tightened. In

some cases, particularly in larger machines, it may be desirable to be able to obtain a more fine adjustment of the position of the plates 17 and the mechanism sup orted thereby. Suchan adjustmentmay be 0 tained in .various manners, two forms of such mechanisms being shown in Figures 6 and 7.

In the form shown in Fi re 6, this result is obtained by providing t e frame A with an car 25 and'the plate 17 with an ear 26. A screw27 is mounted in the ear 25 for free rotation therein but is held against longtudinal movement and is threaded into e car 26. In the modification shown in Figure 7 one of the ears 19 of the plate 17 is extended at 28 and the frame Ahas an ear 29 struck up therefrom. A'screw'30 is mounted in the ear=28'to rotate but is held against longitudinal movement and is threaded into thescrew vWe have also illustrated means for limiting theshifting movement of the shift frame in both directions. In-Figure 3 such means is shown comprising cars 31 and 32 struck up from the p1ate17 and carrying stop screws 33 and 34. In the form of the construction illustrated in Figures 2, 4and 9 the screws 33 and 34 are carried by cars 35 and 36 respectively struck up from a plate 37 sup orted by rivets 38 to theside frame A o the machine. In either case an car 39 of the member 8 extends into position to engage the stop screws at the limit of the shifting movement in either direction.

A shift key 40 is located at each side of the keyboard and these shift keys ares'ecured to a pivotally mounted rock shaft 41 which has an upwardly extending arm 42 attached to a rearwardly extending link 43. This link isconnected to the arm 13 below its pivotal center so that a depression of the shift keys will operate to move the shift frame and laten to upper case position. A shift lock e is shown at 44.

t will, therefore, be seen that the invention comprises simple, compact and efiicient means for attaining the ob'ects of the invention previously recited. t is obvious that various detail changes may be made in the precise form and arrangement and that parts of the invention may be employed alone or in other relations without in any way departing from the spirit of the invention. It is, therefore, to be considered that the invention is limited only by the scope of the appended claims.

We claim as our invention.

1. In a typewriting machine embodying a main frame and a shift frame having a pivotal movement for case shift purposes, the combination of a rock shaft for obtainin said movement, a cone bearing for each en of said rock shaft, studs receiving said cone bearings, and adjustable members supporting said studs.

2. In a typewriting machine embodying a main frame and a shift frame having a PIV- otal movement for case shift purposes, the combination of a rock shaft for obtaining said movement, an adjustable cone bearing for each end of said rock shaft, studs receiving said cone bearings, and adjustable members supporting said studs.

3. In a typewriting machine embodying a main frame and a shift frame having a pivotal movement for case shift purposes, the

combination of a rock shaft for obtaining said movement, a cone bearing for each end of said rock shaft, studs receiving said cone bearings, adjustable members supporting said studs, and means for adjusting said members relative to the main frame.

4. In a t pewriting machine embodying a carriage, t e combination of two rails on the carriage, a shift frame entirely supporting the carriage, two cooperating rails thereon, a member extending from each of the rails on the shift frame toward its comanion rail, and means adjustably connecting said members to permit the adjustment of one of said rails relative to the other.

5. In a typewriting machine, the combination with a main frame including side plates respectively formed with alined guide slots, of a carria e including a platen, type bars disposed in front of said platen, a shift frame supporting the carriage, a pair of supporting plates on which the shift frame is mounted and having guide ears extendin laterally into said guide slots whereby sai supporting plates, shift frame, and carriage, may be adjusted as a unit towards and from said type arms, and separate means for retaining said plates in adjusted positions.

6. In a typewriting machine,,the combination with a main frame including side plates respectively formed with alined guide slots, of a carria e including a platen, type bars disposed in front of said platen, a shift frame supporting the carriage, a pair of supporting plates on which the shift frame is mounted and having guide ears extendin laterally into said guide slots whereby sai supportin plates, shift frame, and carriage may be a justed as a unit towards and from said type arms, and means for adjusting said supporting plates along said slots comprising ears extending outwardly from the side plates of the main frame, and screws respectively engaging one of the guide ears of the supporting frame and the associated ear of the side plate.

7. In a typewriting machine, the combination with a main frame including side plates respectively formed with alined guide slots, of a carriage including a platen, type bars disposed in front of said platen, a shift frame supporting the carriage, a pair of supporting plates on which the shift frame is mounted and having guide ears extending laterally into said guide slots whereby said supporting plates, shift frame, and carriage may be adjusted as a unit towards and from said type arms, means for adjusting said supporting plates along said slots comprising ears extending outwardly from the side plates of the main frame, and screws respectively engaging one of the guide ears of the su porting frame and the associated ear of t e side plate, and separate means for retaining I said plates in adjusted ositions.

In testimony whereo we have hereunto subscribed our names.

LEWIS C. MYERS. GEORGE F. HANDLEY. 

